A. The scene of a bloody homicide, next to an outdoor building near the ocean.

Q. Where is it supposed to be on the show?

A. In the Liberty City neighborhood of Miami.

Q.
When did we see it on the show?

A. In Episode 6, of Season 8, "A Little Reflection".

Dexter shows up at the scene of a homicide.

Masuka shows him the body of a young woman lying in a pool of blood next to a building. There is blood spatter on the nearby walls and columns.

While doing his job (as a blood spatter analyst), Dexter spots Zach Hamilton nearby, shooting his own photographs of the crime scene from afar.

Dexter
notes that Zach seems attracted to blood, and sees this as an
opportunity for vetting him. He goes over to Zach, engages him in
conversation, and invites him behind the yellow tape, near the blood spatter.

Dexter describes for Zach how the woman was stabbed to death, in intimate detail, while Zach enthusiastically shoots close-up photos of the blood.

Zach asks how the killer was caught, and then mentions that he should have worn gloves and long sleeves to avoid leaving evidence.

This further convinces Dexter that Zach is most likely a killer, but he still needs hard evidence. So he asks Zach to tell him when the photos are ready, as an excuse to drop by Zach's studio.

Q. What is it actually in real life?

A. A marina building.

Q. Where can I find it in real life?

A. This building is part of the Cabrillo Marina complex in San Pedro, CA.

The complex is made up of many similar white, Spanish-style buildings (of various sizes) with red tile roofs, clustered around the edge of the marina docks, near the Hilton Doubletree Hotel.

This
specific part of the marina complex, with the large fountain, the white
building, and the open lawn/patio in between, is referred to as the Cabrillo Plaza, and offers a very scenic panorama of the sea, beach and nearby cliffs.

This particular small building is called the Plaza Room, and is right next to (just east of) the large fountain, at the south end of the street called Via Cabrillo Marina - where that street ends in a loop (and leads into the Whaler's Walk parking lot). The approximate address is 2884 Via Cabrillo Marina.

I've been there on a few
occasions to take in the view of the Cabrillo bay, and to shoot photos
of the fountain. I always just assumed that the white building was
probably just restrooms or offices, but I have since learned that the building contains a large room that is often rented out (along with the scenic patio area outside it) for weddings and other events.

In this scene, Dexter & Zach are on thesouth side of that white building. The body of the victim is lying near the third column from the west end, with her head facing the north.

Early on, Zach is standing off to the southeast side, behind the yellow tape, near the large tree.

They used another part of this same Cabrillo marina complex for the later scenes of the Yacht Club restaurant, where Dexter stalked Zach (while Zach stalked Sofia).

A. I've been to the Cabrillo Marina on several different occasions, and shot photos there of the fountain and seascape.

So I recognized it when I saw it. The only challenge was figuring out which side of the building they were on (since both sides look similar), but that was easily determined. The scene shows a trellis at the far end, and aerial photos show that the trellis is on the east end, meaning that Dex was on the south side.

Then I went there again, after the episode aired, and shot the matching photos you see above.